6 Best Natural Gas Inverter Generators (Buying Guide)

Looking for the best natural gas inverter generator for your home or business? Generators that run on natural gas, also known as propane, offer several advantages over traditional gas or diesel models. Inverter generators are also becoming increasingly popular due to their advanced features, quiet operation and fuel efficiency.

In this blog post, we will discuss what to look for when shopping for the best natural gas inverter generator and provide reviews of the top 6 models on the market. Whether you need backup power for your home during outages or reliable power for outdoor events and work sites, a propane-fueled inverter generator is a great option to consider.

What is a Natural Gas Inverter Generator?

Natural gas inverter generators use propane as their primary fuel source instead of gasoline. This provides a few key benefits:

  • Clean Energy: Propane is a clean-burning fuel that does not contaminate engine oil like gas does. This extends the life of the generator.
  • Efficiency: Inverter generators with propane fuel convert more of the fuel’s energy into usable electricity with less waste heat and emissions. This improves fuel efficiency.
  • Quiet Operation: Natural gas generators run much more quietly than traditional gas or diesel generators. This makes them better for residential areas.
  • Fuel Accessibility: Propane tanks are easy to find and hook up to the generator either permanently or temporarily. Refueling is simple.
  • Durability: Natural gas does not degrade fuel lines or components like gasoline can. This also extends the overall life of the generator.

Inverter generators also offer key advantages like:

  • Cleaner power output that is safe for sensitive electronics
  • Lighter weight and more compact size
  • Increased portability compared to traditional generators

Combining inverter technology with natural gas fuel results in generators that are efficient, quiet, low-maintenance and easy to use. Now let’s look at the top models available and their key features.

Reviews of the 6 Best Natural Gas Inverter Generators

1. Generac 7686 iQ3500 Inverter Generator

The Generac 7686 iQ3500 is a robust and powerful inverter generator fueled by either natural gas or liquid propane. Key features include:

  • 3500 starting watts and 3000 running watts
  • Inverter technology provides clean electricity safe for electronics
  • Nearly 18 hours of run time at 25% load on a single propane tank
  • Quiet operation at 57 dB(A) for home use
  • Integrated fuel gauge shows remaining runtime
  • True Power Technology for safe use with delicate electronics
  • OHVI® engine protects against wear and tear
  • Compact and portable design with handles at only 99 lbs

Best Natural Gas Inverter Generators

This Generac propane generator is perfect for home backup power, RV and camper use, and outdoor events. It provides 7 days of runtime on a single tank and is ultra-quiet for residential areas. The True Power inverter technology protects sensitive devices like TVs and computers. An excellent all-around natural gas inverter generator for portable power needs.

2. Champion 100594 9375/7500-Watt Dual Fuel Generator

For serious power needs, the Champion 100594 dual fuel inverter generator is one of the best propane generators available. Key features:

  • Massive 9375 starting watts and 7500 running watts
  • Dual Fuel – operates on either propane or gasoline
  • Electric start with battery included
  • Quiet operation at 64 dB(A)
  • RV-ready with clean electricity safe for electronics
  • Up to 14 hours at 50% load on a full propane tank
  • Intelligauge monitors voltage, frequency and runtime hours
  • 3-year limited warranty with lifetime tech support

This Champion whole house generator provides incredible power for large homes, job sites and outdoor events. It can run multiple high-wattage appliances with ease thanks to the commercial-grade 4-stroke engine. The electric start and included battery make it easy to get running. This heavy-duty propane generator is expensive but worth it for the huge power output and great durability.

3. Rainier R12000DF Dual Fuel Generator

The Rainier R12000DF is another excellent choice for a high-power dual fuel generator running on either gasoline or propane. Key features:

  • 12000 starting watts and 9500 running watts
  • Commercial-grade 420cc engine for maximum output
  • Dual Fuel allows for propane or gasoline as needed
  • Electric start with remote key fob
  • <69 dB(A) for reasonable quiet operation
  • Runs up to 8 hours at 50% load on a full propane tank
  • Digital readout shows voltage, hertz, and runtime
  • CARB compliant and EPA approved
  • 3-year manufacturer’s warranty

Best Natural Gas Inverter Generators

This heavy-duty dual fuel generator from Rainier can handle the most demanding jobs with its huge power output. It switches easily between gasoline and propane fuel to use whatever you have on hand. The electric start and included battery along with the remote start key make it convenient to operate. At under 70 dB(A), it manages the power with decent quietness as well. An outstanding propane whole house generator overall.

4. Champion 755445 3000W RV Ready Portable Generator

For a more portable inverter generator designed for RV and camper usage, the Champion 755445 is an excellent propane-fueled model. Key features:

  • 3000 starting watts and 2800 running watts
  • Super quiet at only 54 dB(A)
  • RV-ready with clean electricity for electronics
  • Up to 14.5 hours of run time on a 20 lb propane tank
  • Includes battery for push button electric start
  • Parallel ready to connect multiple units
  • Economy mode for fuel efficiency
  • Intelligauge, low oil shutdown, and outlet overload protection

This RV generator runs very quietly but still provides plenty of power for road trips and camping. The electric start and included battery along with propane fuel make it completely self-contained. Economy mode conserves fuel when maximum wattage isn’t needed. It’s compact and easy to transport as well. One of the best small inverter generators for RV and trailer owners.

5. WEN GN400i 4000-Watt RV Inverter Generator

Another good propane generator for RV use is the WEN GN400i. Key features include:

  • 4000 starting watts and 3500 running watts
  • Super quiet operation at just 55 decibels
  • Electric start with buttons or wireless remote
  • Clean power protects sensitive electronics
  • Up to 9 hours of run time at 50% load
  • Fuel shutoff maximizes generator life
  • Parallel connectivity to combine with other units
  • CARB compliant and EPA III emissions standards
  • 2-year warranty

Best Natural Gas Inverter Generators

This WEN RV generator provides excellent power output and runtime for a small and portable unit. The electric start options make it very easy to start up, while the quiet operation keeps campground neighbors happy. It’s also priced affordably compared to similar propane-fueled inverter models. A great choice for RV owners who want proven reliability and performance.

6. DuroMax XP12000EH Dual Fuel Generator

For extremely heavy-duty power needs, the DuroMax XP12000EH dual fuel generator is one of the largest and most robust options out there. Key features:

  • Massive 12000 starting watts and 10000 running watts
  • Dual fuel operation using either gasoline or propane
  • Commercial-grade engine with electric start
  • <69 dB(A) for decent quietness at high power levels
  • Runs up to 10 hours on a full tank of propane
  • Digital controls with full power panel
  • Neutral bonding switch for RVs and construction
  • Highly durable and reliable construction
  • 3-year limited warranty

If you need to power an entire home or construction site, this monster dual fuel generator can handle it. The electric start ensures easy startups while the huge power output lets you run high loads without issue. It also manages to keep noise levels reasonable despite the intense wattage output. The Duromax XP12000EH is an investment, but delivers performance and reliability for the most demanding applications.

What to Look for in a Natural Gas Inverter Generator

Here are some key factors to keep in mind when choosing the best natural gas inverter generator for your needs:

  • Wattage – Make sure to select a generator with enough starting and running wattage for the devices and appliances you need to power. Know your required wattage before buying.
  • Runtime – Propane tank size and generator fuel efficiency determine runtime. Look for longer runtimes from full tanks if extended use is needed.
  • Noise Level – Inverter generators are much quieter, but dB ratings still vary. Check noise levels if using in residential areas. Under 65 dB(A) is preferable.
  • Portability – Consider the overall size and weight if you need a portable unit for camping or work sites. Look for handles and wheels to aid movement.
  • Electric Start – Electric start capability makes startup much easier, especially if the unit includes an onboard battery.
  • Warranty – Generator engines work hard, so look for at least a 2 to 3-year manufacturer’s warranty for peace of mind.
  • Power Quality – Inverter generators produce clean sine wave power that is safe for sensitive electronics. Non-inverter models can damage devices.
  • Safety Features – Look for overload protection, low oil automatic shutoff, and fuel shutoffs to prevent damage and hazards.

By carefully considering these factors, you can select the ideal natural gas inverter generator for home backup power, RV travel, job sites, and outdoor events.

Frequently Asked Questions About Natural Gas Inverter Generators

How long can a natural gas generator run on one tank of propane?

Runtime varies based on tank size, generator wattage, and load. Typically an inverter generator can run 10-14 hours on a standard 20 lb propane tank at 50% load. Higher loads use fuel faster. Large tanks can extend runtimes to multiple days of use.

Is natural gas safe to run my generator in an enclosed space?

No, never run any type of gas or propane powered generator in enclosed indoor spaces due to risk of carbon monoxide poisoning. Only operate them outdoors in well-ventilated areas.

Do natural gas generators require special maintenance?

Not really. Just follow the manufacturer maintenance guidelines. Propane is a clean-burning fuel so there is less wear on components compared to gasoline-powered models.

What size of natural gas generator do I need for backup power?

Add up the wattages of the essential devices and appliances you want to run during an outage. Choose a generator with enough running watts and starting (surge) watts to accommodate your total load. Include 20-30% more capacity as a safety buffer.

Is inverter generator power really safer for electronics?

Yes, inverter generators produce clean sine wave power instead of “dirty” power with spikes and fluctuations. This makes them safe for sensitive electronics like phones, TVs, and computers.

How long does propane fuel stay fresh or usable in the tank?

Propane does not degrade over time like gasoline so it can remain viable in a sealed tank for many months. Always use fuel stabilizer additives for long term gasoline storage.

Should I get a dual fuel model that can use both propane and gasoline?

Dual fuel capability gives you flexibility if propane is not available and offers some homeowners insurance benefits. But expect a higher price tag. Most people can use propane-only models without issue.


Investing in one of the best natural gas inverter generators can give you clean, efficient and reliable power whenever and wherever you need it. They offer advantages over traditional gas and diesel generators in residential areas given their quiet operation, clean electricity, and easy hookup to propane tanks.

Use the reviews and buying considerations in this article to match the right propane-powered inverter generator model to your specific power needs. Then enjoy the performance and convenience offered by natural gas generators for home, RV, and professional use! Just be sure to always operate them safely outdoors with proper ventilation.

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